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The AVE high-speed trains are worth comparing to air travel. Looking six weeks in advance, I found one-way trips taking two and a half hours for as low as 85 euros. While I like flying with Vueling, the time and cost of going to and from airports, plus the security procedures, luggage etc. make the train competitive and certainly more comfortable. http://www.renfe.com/EN/viajeros/index.html Also plenty of wisdom at http://www.seat61.com/Spain-trains.htm

That air route is more or less a shuttle service. Used to be there was a flight both ways about every hour of the weekday.

But I agree that even though the flight takes about an hour you need to also consider the time and cost of getting to and from each airport; the issue of luggage in terms of weight restrictions; the time for security at the departure airport, etc.

Comfort? Let's face it, for an hour flight the comfort issue is probably minor for most folks.